Reverberatory furnace



W. F. SKLENAR.

REvEnmA-onv FURNACL APPLICATION FILED OCT. 3, 192| Patented Dec. 12, 1922.

INVENTQP wrinnnsrnw Ensim extensie, or tonnen, ENGLAND.

BEVERBEBATORY FURNACE.

Application filed October 3, 1921.

To all whom it may concern:

Be it known that l, llf'nn'ansnaw llnaNx SxLnrsin, a subject or *tlzeclioblovalna, residi 5, Caldervale bloed, Clapham (Jommon, London, ling d, have invented a neri or improved lleoeratory urnace or which the following' is specilication. I

rllhis invention relates to a new or improved reverberatory iuinace ol the iusion or melting type and has "for its p mary1obj ect the production a highly enicient turnace which may 1n some cases be readily moved from place to place as required, is 1nexpensive to construct, and operate, and 1s economical in iuel. n i

The present invention consists ot a reverberatory air blast furnace and comprises essentially a metal casing, a carriage or 'frame supporting said casing, and in some cases wheels carried by the carriage or trame adapting it to be moved. trom place .to place, preferably on rails, a lining .oi lire briclrs so arranged and held within said 1casing as to form a working bed with vaulted root, a combustion chamber lire place, a lire bridge and an up taire orhhopper at 'the opposite end to the tire place in communication with the working chamber by a restricted passage, an inlet tor compressed air situated beneath the fire bars, which are re: movable, charging holes in the for :tnel and metal and inspection and tapping holes in the side wall.

By the introduction of an air blast 1n a reverberatory melting furnace, the time required -for bringing` the metal to a casting temperature is much reduced and an economy ot' fuel is obtained by thepinore perfect combustion resulting from a rorced draught. Q

The improved furnace which A:lay be used for melting all metals and allo; but is more particularly applicable for meltingv copper alloys and has marked advantages over the more usual method of employing pot or Crucible furnaces and owing to the greater heat obtainable in less time than with the usual furnaces employed for melting copper alloys, iu practicable to obtain tterl results in a more economical manner, as since the instal is not exposed to such an extended heating period in its molten or Jini-molten condition, the more easily xidizable metals-#tor instance the spelt-cr in brasses are not volatiliaed to such an extent, moref f i tl' certain co )oer allows it i.o usual to oi i yvi -i 1i Serial No. 505,180.

add an excess ol" one of the metals t0 obtain a freely ruiming metal at a lower tempera-l lor instance in casting phosphor v ture, bronze, it is usual to add an excess of phosphor copperwhich is the most expensive of the alloying` metals-in order to obtain an alloy suriioiently'luid for casting at the temperature obtainable in a pot or Crucible iurnace.

fir further advantage of the present invention is that an uninterrupted succession of charges can be melted or practically a continuous working of the improved furnace, is

possible thereby resulting in a great economy ci :uel and-when furnished with wheels'- owing to it being possible to readily move tlm furnace from place topplace during operation, it may bebrought into proper posif` tion, JSor pouring into the'moulds without.

having' lirst to run the molten metal into a ladle, thus eii'ecting economy in time and labour.

lt will also be appreciated that by making it possible to dispense with a chimney as is necessary with existing furnaces, the first cost of the vfurnace is very materially reduced,

ln the accompanying drawing illustrating this invention:

l is a view in side elevation of the improved reverberatory furnace.

2 is a similar view thereof in longitudinal section.

3 is a transverse section on line AA of Fig. 2, and

4 is a sectional plan view.

Throughout the; views similar parts are marked with like letters of reference.

A suitably shaped metal casing a, preferably ormed ot' angle iron and metal plates rivetted together, is mounted on an under frame Z) which is provided with wheels o adapting the entire furnace to be readily moved from place to place, preferablyon rails d.

rlhe metal casing a is furnished with an interior lining of lire clay, ganister, or preferably fire bricks as shown so arranged or built up as to provide a vaulted rootl al and a curved working bed a2 which also slopes transversely (see Fig. 3) the arrangement being such that the lowest point of the bed is opposite the tapping hole or duct e in the 'side wall. et the back end of the bed a2 is formed the combustion chamber or lire place i3 and between the two is formed the usual fire bridge at. The top of this bridge is provided with bricks set on edge and a distance apart so as to form passages for the better distribution of the hot gases over the metal. lWithin the lower part of the chamber a3 are arranged longitudinal bearers f over which are placed transverse fire bars fl. rllhis arrangement allows for lire bars being readily adjusted and renewed.

At the opposite end of the furnace to the chamber is formed a short vertical up take or hopper a5 Which is in communication With the Working chamber by a restricted passage as. rf`his up take or hopper a5 serves not only as an exit for the combustion gases but serves also for the `introduction of fresh metal into the furnace. il hole al in the roof al immediately above the bed a2 is also provided for introducing fresh metal-for instance in the form of turnings7 filings or the like-into the furnace and is normally closed byl a cover as. A hole al is provided in the roof over the combustion chamber a3 for the introduction of fuel Which hole is normally closed by a cover al".

A door all is provided for giving access to the lire place a3 and a hole all preferably situated above the tapping hole or duct e is provided in the side Wall to allow of inspecting the interior of the furnace or/and for the introduction of tools or rods for stirring the molten metal on the bed al. On the opposite side Wall to that of the door all and entering the combustion chamber or fire place a3 is a pipe or inlet g for he introduction of an air blast or a volume of compressed air from any suitable source.

ln a. modification particularly adapted for melting iron and steel scrap, the up take or neaeaa hopper a5 may be inclined instead of vertical as shown so as to allovv an easier path for the escape of products of combustion.

l claim l. A reverberatory melting furnace comprising a, metal casing, a frame supporting said casing, alining of fire bricks arranged Within said casing to form (l) a Working bed with vaulted roof constituting a Working chamber (2) an enclosed combustion chamber or lire place a fire bridge (a) an up taire and metal feeding hopper at the opposite end to the lire place, and (5) a restricted passage forming a communication between said hopper and the Working chamber,l an inlet for compressed air openinO into the combustion chamber beneath the fire bars of the grate, charging holes in the roof for fuel and metal and inspection and tapping hol-es in the side Wall, as set forth.

2, A reverberatory melting furnace com'- prising a metal casing, a frame supporting said easing, Wheels carried by said frame adapting it to be readily transported, a lining` of fire bricks arranged Within said casto form (l) a Working bed with vaulted roof constituting a Working chamber (2) an enclosed combustion chamber or lire place a lire bridge (el) an up take and metal feeding` hopper at the opposite end to the fire place, and (5) a restricted passage forming a communication between the hopper and the Working chamber, an inlet for compressed air opening into the combustion chamber beneath the fire bars of the grate, charging holes in the roof for fuel and metal and inspection and tapping holes in the side Wall., as set forth.

VENZESLAWV FRANK S-KLENAR. 

